Coming in hot on the heels of our own Development B9 A4, we had the opportunity to do more research and development on another B9 A4 with a hybrid turbo upgrade. Waylen brought us his Audi A4 with a similar selection of hardware upgrades and fuelling upgrades. The only major difference aside from his slew of exterior and interior/comfort upgrades was his turbo choice.The turbo in question? A The Turbo Engineers TTE-440L. Their longitudinal hybrid turbo upgrade for the EA888.3 2.0T found in the B9 chassis. On paper, this is a slightly larger turbo than the Perun Turbo hybrid that we chose for our Development car, which does sound good. But as we know from our experience tuning our own B9, the limiting factor would probably be the fuelling. So with a larger turbo, how far would we be able to go without hitting the fuelling wall? If you've been following along for a little while, you know that our tuning philosophy is based on smooth, drivable power delivery. With Waylens car, this was no exception. We started off with a low boost base map so it was safe to drive and we could get the car from his installer to our facility without worrying about damaging anything. Comparing the base map to our final numbers on our own B9 development car showed a lot of headroom (Green line vs. Orange line in the above graph) but with a slightly slower spool. After some wastegate adjustments and several data logs and file revisions, we were able to get some boost management and could turn things up quite a bit more. One of the hurdles for the development on the B9 for us was utilizing the OEM ECU to get things to work nicely together. Since these ECU's are only partially cracked, it presents more of a challenge to log and adjust certain parameters. Ultimately, we were able to get enough out of what we were able to adjust and quickly saw this turbo was very capable of good numbers.If you've paid attention to our youtube findings, you'll be looking at these numbers and doing the 30hp correction in your head. On a typical roller dyno, you're cracking 350WHP and 400 lb-ft. Some may say it's not worth all that time and money to only produce slightly more power than a Stage 2 setup on this vehicle. And while we may also agree, we are still excited to be able to see what this platform is capable of. Maybe in the future, there will be more development with fuelling upgrades to get these stage 3 numbers up closer to the 400 mark. Europe got a MPI (Multi port injection) setup, and it would be interesting to see where we could land with our Canadian fuel and some upgraded injectors. Until then, we'll let you decide if 374 lb-ft of torque and 320 WHP is worth the effort and money on the B9 platform. If you want to see more about Waylens car, have a peak at our YouTube video which goes into it a little more.
